Return-Path: X-Spam-DCC: paranoid 1290; Body=3 Fuz1=2 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_40_50,HTML_MESSAGE,MIME_HTML_ONLY,NO_REAL_NAME autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tB8BnLqH032729 for ; Tue, 8 Dec 2015 12:49:21 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a6GiY-0005N3-E8 for rs_out_1@blacksheep.org; Tue, 08 Dec 2015 11:46:02 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a6GiY-0005Mu-1d for rsgb_lf_group@blacksheep.org; Tue, 08 Dec 2015 11:46:02 +0000 Received: from smtp-out01.xworks.net ([31.25.48.13]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86) (envelope-from ) id 1a6GhT-0000bK-R7 for rsgb_lf_group@blacksheep.org; Tue, 08 Dec 2015 11:46:00 +0000 Received: from mailbackend1 (cluster06.xworks.net [10.100.1.80]) by smtp-out01.xworks.net (Postfix) with ESMTP id 803DB614BA for ; Tue, 8 Dec 2015 12:44:39 +0100 (CET) X-DKIM-Result: Domain=kabelmail.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kabelmail.de; s=mail; t=1449575079; bh=PnHMJiYhnq4ay1HpCBY2nsn48yVPM6/qf7aHrhBx0PY=; h=In-Reply-To:From:To:Date:Subject:MIME-Version:Content-type; b=VgF896vBP+DarC9p84XUQZer48KNgvWFsX3ENBH+N5hzK97ZKxfqq3ayaqPMxIazj gKZI3dszOphzgQjoAxB/R5b5IZKjnJ+g/d92nyYYQKHNOmjJ1MjfN3zhtzflswBXNP v1kanQGRijjuCf+vKmgXjsYkPqh4uln1X+DvpcGw= In-Reply-To: From: uwe-jannsen@kabelmail.de To: rsgb_lf_group@blacksheep.org Message-ID: Date: Tue, 08 Dec 2015 12:44:37 +0100 X-Priority: 3 MIME-Version: 1.0 X-Scan-Signature: 3b8620872b19e25fb6f4dfaf1256edc3 Subject: AW: AW: Re: AW: LF: 8270 Hz traces again! AK Content-type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5660

carrier on the air=2E
the message sta= rts at 18:00:00
wedj8wx

Von: uwe-jannsen@kabelmail=2Ede
Gesendet: 03=2E12=2E2015 13:= 45
An: <rsgb_lf_group@blacksheep=2Eorg>
Betreff: AW: Re: AW: LF: 8270 Hz = traces again! AK

hope the transmission can stay 2= 4 hours a day on the air soon=2E
so your analysis may show less phas= e destructions at night hours=2E
Uwe/dj8wx

Von: Paul Nicholson <vlf0403@abelian=2E= org>
= Gesendet: 01=2E12=2E2015 23:27
An: <rsgb_lf_group@blacksheep=2Eorg&g= t;
Betre= ff: Re: AW: LF: 8270 Hz traces again! AK

Uwe wr= ote:

> transmission CL because of heavy rain

Got a goo= d carrier from you

http://abelian=2Eorg/vlf/fbins=2Eshtml#p=3D1448996400&b=3D09= 0&s=3Dsp

and this decoded easily in EbNaut using 10 seco= nd symbols,
eg 8K19A 2 characters,

found rank 7: ** ps [ 2 30= 30 30 30]
re-encode 140/368 ber 3=2E80e-01 Es/N0=3D-13=2E3 Eb/N0=3D= 1=2E6

Carrier decodes as a series of '*' characters which is han= dy
for testing=2E Using the carrier I can try a range of message
= lengths and symbol periods=2E

Using about an hour of carrier fro= m 17:00 I got

8K19A, 8 seconds, 3 chars: Eb/N0=3D-0=2E2
16K21= A, 4 seconds, 3 chars: Eb/N0=3D1=2E0
8K23A, 7 seconds, 4 chars: no d= ecode

I grabbed 3 hours of carrier, 15:00 to 18:00 and played ar= ound
with that but couldn't get a decode from it=2E It's a bad time<= br>of day due to the terminator passage, the phase goes all over
the= place so I'm not too surprised=2E

Tested the carrier 15:00 to 1= 6:00 and got

8K23A, 7 seconds, 4 chars: -0=2E8 dB (BER 38=2E9% r= ank 679)
16K21A, 3=2E4 seconds, 5 chars: -0=2E7 dB (BER 41=2E4% rank= 3200)

I couldn't get anything from the 90 minutes 15:00 to 16:3= 0=2E

--
Paul Nicholson
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